[W126 Coupe] spark plugs

[RONNY GEENEN]

Jonathan,
I followed your discussion. You mentioned it is better to use 20/50 oil.
Is that just the normal oil? I use for my cars only full synthetic oil and change it every 5,000 miles.

Ronny
Glendora, Ca 91740
1987 560 SEC
1984 300 SD
  ----- Original Message ----- 
  From: Jonathan 
  To: Mercedes Coupes Mailing Lists 
  Sent: Saturday, March 01, 2008 6:08 PM
  Subject: Re: [W126 Coupe] spark plugs


  Hello Bill,

  Yes, All M116/117's need the same looking after in regards to the timing chain/tensioner/guide rails/oil line clips.  Aside from getting the job done it is of Utmost importance to use Genuine guides as well as a Genuine tensioner.  

  15/40 is good, you may find 20/50 even better.  For off the shelf oil that still meets the needs of our engines (re, zinc/phosphate etc..) I've been using Valvoline Racing 20/50.

  Shrouding is what happens when you have Large amounts of deposits forming on your spark plugs..to the point where they cover the electrode and form an actual cover/shroud over the tip.

  Jonathan

  Bill Reford wrote: 
    Hi Jonathan,

    We just did a timing chain (172,00KM)(108,000 Miles) and she will be re-assembled shortly, I was interested to see what shape the chain/tensioner etc, was in.(fear of the unknown)

    The chain showed some wear (minor) the rest of it showed very little wear (pleasently surprised, as per the lists dialogue over the years) (replaced everything anyway),  I believe that the car has had an easy life, judging by the engine internals, and by the history that I got when I imported the car from Germany in 2000 and the service by me since then. 

    The plugs look good after 15,000 km (since the last change) (light brown and with no oil deposits appearing)

    Question ... I have a 1990 560 SEL (US) as well, with similar mileage, (milage is accurate) with regular service by MB since new. Does the timing chain and their components wear the same as on a 1995 euro 500 ? should I assume that the chain needs attention ? 

    I use Castrol 15W40 and change every 5000 KM. (in the winter they are both garage queens)

    What is shrouding ??

    Bill
      ----- Original Message ----- 
      From: Jonathan 
      To: Mercedes Coupes Mailing Lists 
      Sent: Saturday, March 01, 2008 5:50 PM
      Subject: Re: [W126 Coupe] spark plugs


      Hello Bill,

      I would just keep an eye on your plugs..If when you inspect them you are starting to see deposits form then I'd make the switch to the BP5's.  Also, if it gets Really bad close the gap down to about .028-.030.   That will help prevent shrouding etc.

      What weight oil are you running?  How many k's since your last oil change?

      Jonathan

      Bill Reford wrote: 
        Jonathan,

        At what mileage or kilometer reading should one choose NGK BP5ES (for tired valve guides) ?? My 85 500 SEC euro is starting to puff smoke (1 or 2 seconds) at startup, when sitting overnight only.

        Bill 
          ----- Original Message ----- 
          From: Jonathan Hodgman 
          To: Mercedes Coupes Mailing Lists 
          Sent: Thursday, February 28, 2008 5:41 PM
          Subject: Re: [W126 Coupe] spark plugs



          NGk Bp6ES or 5 ES if you valve guides are getting tired..


          Jonathna


          On Thu, Feb 28, 2008 at 5:38 PM, Gary <garysalas at yahoo.com> wrote:

            my store no longer sells the bosch so what's another plug?  

            The MB Coupes Website!
            W126 SEC Mailing List
            Postings remain property of MB Coupes, L.L.C.




          -- 
          Blue Ridge Mercedes/AMG East
          Offering Enthusiast Service, Restoration and Modification.
          Providing quality parts to discriminating customers in all parts of the world.
          Located in the Greater Atlanta area.
          http://www.blueridgemb.com
          404 805 1357

          1996 S600 Euro "Scharnhorst"
          1991 560 SEC Full Euro ECE
          1991 560 SEC 226Hp/271ft/lbs:)
          1989 560 SEC AMG (N.Amer 250/295)
          1986 560 SEL AMG 6.0L 32V
          1980 280 SE Euro
          1978 300D TMU
          1987 560 SEL 162K Midnight Blue on Gray RIP:(
          2006 Z4 3.0Si M spec 6sp 
----------------------------------------------------------------------
          The MB Coupes Website!
          W126 SEC Mailing List
          Postings remain property of MB Coupes, L.L.C.
------------------------------------------------------------------------
The MB Coupes Website!
W126 SEC Mailing List
Postings remain property of MB Coupes, L.L.C.


-- 
Blue Ridge Mercedes
Offering Enthusiast Service, Restoration and Modification.
Providing quality parts to discriminating customers in all parts of the world.
Located in the Greater Atlanta area.
http://www.blueridgemb.com
*Updates weekly*

1996 S600 Euro "Scharnhorst"
1991 560 SEC Euro ECE Conv. (for sale)
1991 560 SEC 226Hp/271ft/lbs (TT conversion IP)
1989 560 SEC Euro ECE *Parts*
1988 300 TE
1989 560 SEC AMG (Mech.lifter/radical cam conv.)
1987 AMG Hammer 6.0L 32V
1986 560 SEL 6.0L 32V AMG
1980 280 SE Euro
2006 Z4 3.0Si M-Spec
    

--------------------------------------------------------------------------
      The MB Coupes Website!
      W126 SEC Mailing List
      Postings remain property of MB Coupes, L.L.C.
----------------------------------------------------------------------------
The MB Coupes Website!
W126 SEC Mailing List
Postings remain property of MB Coupes, L.L.C.


-- 
Blue Ridge Mercedes
Offering Enthusiast Service, Restoration and Modification.
Providing quality parts to discriminating customers in all parts of the world.
Located in the Greater Atlanta area.
http://www.blueridgemb.com
*Updates weekly*

1996 S600 Euro "Scharnhorst"
1991 560 SEC Euro ECE Conv. (for sale)
1991 560 SEC 226Hp/271ft/lbs (TT conversion IP)
1989 560 SEC Euro ECE *Parts*
1988 300 TE
1989 560 SEC AMG (Mech.lifter/radical cam conv.)
1987 AMG Hammer 6.0L 32V
1986 560 SEL 6.0L 32V AMG
1980 280 SE Euro
2006 Z4 3.0Si M-Spec


------------------------------------------------------------------------------


  The MB Coupes Website!
  W126 SEC Mailing List
  Postings remain property of MB Coupes, L.L.C.


------------------------------------------------------------------------------


  No virus found in this incoming message.
  Checked by AVG Free Edition. 
  Version: 7.5.516 / Virus Database: 269.21.2/1305 - Release Date: 2/29/2008 6:32 PM
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.pairlist.net/pipermail/mbcoupes/attachments/20080301/d224bbfa/attachment-0001.html>